一、直接写出得数。（共24分）
$\frac{4}{9} + \frac{5}{18} =$
$2.7 + 7.3 =$
$0.4^2 =$
$24 × ( \frac{1}{4} + \frac{1}{3} ) =$
$\frac{1}{8} ÷ \frac{1}{7} =$
$70 × 1.8 =$
$0.5 ÷ \frac{1}{10000} =$
$36 ÷ \frac{1}{4} × \frac{1}{6} =$
$\frac{11}{6} × \frac{7}{22} =$
$\frac{4}{5} - \frac{2}{3} =$
$\frac{25}{4} × \frac{2}{5} =$
$(7.3 - 4.8) × 4 =$
$2.7 × 0.3 =$
$45 × \frac{5}{18} =$
$\frac{3}{4} × 0.5 =$
$9 ÷ ( 1 - \frac{2}{5} ) =$
$\frac{1}{4} - \frac{1}{6} =$
$0.25 × 16 =$
$\frac{39}{4} ÷ \frac{13}{8} =$
$3.6 × 1.2 × 0.5 =$
$\frac{17}{18} ÷ \frac{5}{6} =$
$0.36 ÷ \frac{12}{13} =$
$320000 × \frac{1}{400000} =$
$2 ÷ \frac{2}{3} - \frac{2}{3} ÷ 2 =$

1.$\frac{13}{18}$ 2.$10$ 3.$0.16$ 4.$14$ 5.$\frac{7}{8}$ 6.$126$ 7.$5000$ 8.$24$ 9.$\frac{7}{12}$ 10.$\frac{2}{15}$ 11.$\frac{5}{2}$ 12.$10$ 13.$0.81$ 14.$\frac{25}{2}$ 15.$\frac{3}{8}$ 16.$15$ 17.$\frac{1}{12}$ 18.$4$ 19.$6$ 20.$2.16$ 21.$\frac{17}{15}$ 22.$0.39$ 23.$\frac{4}{5}$ 24.$2\frac{2}{3}$

二、用竖式计算，带☆的要验算。（共20分）
0.47×18=
☆0.24×4.6=
3.08×0.43≈
（得数保留两位小数）
6.615÷45=
1.288÷0.56=
☆3.264÷0.32=

1.$8.46$ 2.$1.104$ 3.$1.32$ 4.$0.147$ 5.$2.3$ 6.$10.2$
竖式及验算略

三、计算下面各题,怎样算简便就怎样算。(共24分)
1. $25×0.87×8×10$
$36÷1.5+2.5×12$
$(\dfrac{2}{19}+\dfrac{1}{7})×7+\dfrac{5}{19}$
$45×98+90$
$\dfrac{8}{33}÷[\dfrac{1}{9}÷(\dfrac{3}{4}-\dfrac{2}{3})]$
$\dfrac{7}{11}×4\dfrac{14}{19}+5\dfrac{5}{19}÷1\dfrac{4}{7}+\dfrac{7}{11}$

1.$87$ 2.$54$ 3.$2$ 4.$4500$ 5.$\frac{2}{11}$ 6.$7$